Usually it is because you have forgotten a number or put in too many digits. Always remember to put the * before your code number, and the # after it. Also, many customers use their phone number without the area code, try the number without the area code. In rare cases if you are over a week late on your rent payment the system will disable your entrance code. You can make a payment at the 24hour payment machine at the entrance by credit card, and this will activate your code. Otherwise, please contact the manager during regular office hours.